PULUODY PMT-2CS Ultra-Pure Water Liquid Particle Counter

Overview

The PULUODY PMT-2CS Ultra-Pure Water Liquid Particle Counter is an engineered solution for quantitative microcontamination analysis in critical fluid systems where sub-micron particle control defines process reliability and product yield. Built upon the 8th-generation dual-laser narrow-beam optical sensing architecture, the instrument operates on the principle of single-particle light scattering—where individual particles passing through a precisely collimated laser beam generate discrete scattering pulses proportional to their size and refractive index contrast with the carrier liquid. This enables high-fidelity, real-time detection of insoluble particulates in ultra-pure water (UPW), semiconductor process chemicals, photoresist solvents, and high-purity polymer solutions. Unlike wide-beam or static-light-scattering instruments, the PMT-2CS’s coaxial dual-laser configuration suppresses background noise, minimizes Mie scattering artifacts, and enhances resolution below 0.1 µm—making it suitable for monitoring UPW systems compliant with SEMI F63 (≤1 particle/mL ≥0.05 µm) and ITRS-defined purity benchmarks.

Key Features

• 8th-generation dual-laser narrow-beam optical sensor with independent wavelength channels for improved signal-to-noise ratio and reduced coincidence error
• Precision metering piston pump with volumetric accuracy better than ±1%, enabling repeatable sample delivery across variable viscosity ranges (0.8–5 cP)
• Integrated electromagnetic flow control system for dynamic compensation during pressure fluctuations in inline or offline sampling configurations
• Embedded 7-inch color LCD touchscreen interface with intuitive icon-driven navigation and full audit trail logging
• Optional wireless keyboard/mouse support for laboratory PC integration and remote operation in Class 100 cleanrooms
• Configurable analog 4–20 mA output with programmable alarm thresholds for PLC or SCADA integration in fab-wide contamination monitoring networks
• Compliance-ready firmware supporting electronic signatures, user access levels (admin/operator/auditor), and time-stamped raw data export in CSV/Excel formats

Sample Compatibility & Compliance

The PMT-2CS supports direct analysis of low-conductivity liquids (e.g., UPW, deionized water, hydrogen peroxide solutions) and moderately viscous organic media (e.g., PGMEA, ethyl lactate, cyclohexanone) without dilution or filtration—provided refractive index differences exceed Δn ≥ 0.02 relative to the base solvent. It meets calibration traceability requirements per ISO 21501-4 (Light Scattering Liquid-Borne Particle Counters) and JJG 1061 (Chinese National Metrological Verification Regulation). For pharmaceutical applications, the system supports USP and particulate matter testing protocols when configured with appropriate sample handling modules and validated SOPs. Data integrity features—including immutable audit trails, operator authentication, and 21 CFR Part 11–compliant electronic records—are available via optional software licensing.

Software & Data Management

The PULUODY V8.3 Particle Analysis Suite provides unified control across embedded and PC platforms. The software includes automated calibration verification routines using NIST-traceable latex standards, dynamic size binning (logarithmic or linear), and multi-parameter statistical reporting (mean, median, standard deviation, cumulative distribution). Raw pulse data is retained with timestamp, sensor temperature, flow rate, and environmental humidity metadata. Export options include ISO 4406 (code-based), NAS 1638, SAE AS4059, and custom contamination grading schemas. All reports are digitally signed and exportable in PDF/A-1b format for regulatory submission. Firmware updates are delivered via secure HTTPS channel with SHA-256 signature verification.

Applications

• Real-time monitoring of UPW distribution loops in semiconductor fabs (200 mm/300 mm wafer processing)
• In-process verification of cleaning agent purity prior to wafer rinse steps (SC1, SC2, DHF)
• Validation of point-of-use (POU) filters in photolithography tool supply lines
• Quality control of display-grade glass substrate rinsing fluids and TFT array coating solvents
• Particulate release testing of medical device packaging materials in ISO 11607 environments
• Stability assessment of nanosuspensions and liposomal formulations under ICH Q5C guidelines
• Baseline contamination profiling for cleanroom HVAC recirculation systems per ISO 14644-2

FAQ

What calibration standards are supported by the PMT-2CS?
The instrument supports calibration using ISO 21501-4–compliant polystyrene latex (PSL) spheres, JJG 1061–certified reference materials, and customer-specific traceable standards—subject to documented metrological equivalence.
Can the PMT-2CS be integrated into a factory automation system?
Yes. The 4–20 mA analog output, Modbus RTU over RS-485, and optional Ethernet/IP interface enable seamless connection to MES, SCADA, and CMMS platforms for centralized contamination analytics.
Is the system compliant with FDA 21 CFR Part 11 requirements?
Out-of-the-box functionality includes role-based access control, electronic signatures, and audit trail generation; full Part 11 compliance requires site-specific validation documentation and network security configuration.
What is the minimum detectable particle size in ultra-pure water?
Under optimized alignment and low-noise operating conditions, the PMT-2CS achieves reliable detection down to 0.05 µm (50 nm) for particles with refractive index >1.45 in UPW (conductivity <0.055 µS/cm).
Does the system require periodic recalibration?
Annual calibration verification against certified reference materials is recommended; field checks using built-in reference pulses and blank water runs should be performed before each analytical session per ISO 21501-4 Clause 8.3.